<template>
    <div class="sidebar">
        <el-menu class="sidebar-el-menu" :default-active="onRoutes" :collapse="collapse" background-color="#324157"
            text-color="#bfcbd9" active-text-color="#20a0ff" unique-opened router>
            <template v-for="item in items">
                <template v-if="item.children">
                    <el-submenu :index="item.id" :key="item.id">
                        <template slot="title">
                            <i :class="item.imgUrl"></i><span slot="title">{{ item.name }}</span>
                        </template>
                        <template v-for="subItem in item.children">
                            <el-submenu v-if="subItem.children" :index="subItem.url" :key="subItem.id">
                                <template slot="title">{{ subItem.name }}</template>
                                <el-menu-item v-for="threeItem in subItem.children" :key="threeItem.id" :index="threeItem.url">
                                    {{ threeItem.name }}
                                </el-menu-item>
                            </el-submenu>
                            <el-menu-item v-else :index="subItem.url" :key="subItem.id">
                                {{ subItem.name }}
                            </el-menu-item>
                        </template>
                    </el-submenu>
                </template>
                <template v-else>
                    <el-menu-item :index="item.url" :key="item.id">
                        <i :class="item.imgUrl"></i><span slot="title">{{ item.title }}</span>
                    </el-menu-item>
                </template>
            </template>
        </el-menu>
    </div>
</template>

<script>
    import bus from '../common/bus';
    import { getMenus,getUserButtonMenus } from '../../api/sys/user'
    export default {
        data() {
            return {
                collapse: false,
                items: [
                    {
                        icon: 'el-icon-lx-home',
                        index: '/dashboard',
                        title: '系统首页'
                    }
                ]
            }
        },
        computed:{
            onRoutes(){
                return this.$route.path.replace('/','');
            }
        },
        methods: {
            menuInit(){
                getMenus({needButton:0}).then(res => {
                    console.log("menus",res);
                    if(res.data && res.data.length>0){
                        this.items = res.data[0].children;
                    }
                });
            },
            buttonInit(){
                getUserButtonMenus().then(res => {
                    console.log("buttons",res);
                    if(res.data && res.data.length>0){
                        this.$store.dispatch('updateAuthsData', res.data);
                    }
                });
            }
        },
        created(){
            // 通过 Event Bus 进行组件间通信，来折叠侧边栏
            bus.$on('collapse', msg => {
                this.collapse = msg;
            })
            this.menuInit();
            this.buttonInit();
        }
    }
</script>

<style scoped>
    .sidebar{
        display: block;
        position: absolute;
        left: 0;
        top: 70px;
        bottom:0;
        overflow-y: scroll;
    }
    .sidebar::-webkit-scrollbar{
        width: 0;
    }
    .sidebar-el-menu:not(.el-menu--collapse){
        width: 180px;
    }
    .sidebar > ul {
        height:100%;
    }
</style>
